Britney Spears shuttered her lip-synching extravaganza in Vegas for the week to return to Los Angeles and shed some body mass. Having her corset burst open at the seams on stage sent a powerful message to Britney — beat your Filipina seamstress not twice but thrice to keep that shit from happening again. Spider silk threads, dammit. Also, maybe hit the spaces in the gym beyond the smoothie bar. Her ass does look remarkably better after just a few boot camp workout days and cessation of all Vegas buffet activities. They say it’s the last few pounds that are most difficult to get off. So Britney’s still in the easy phase.